A system is described for providing backhaul over an Ethernet passive optical network (EPON). The backhaul may be backhaul for EV-DO and/or EV-DO Rev. A communications. The system for includes at least one cell site. At least two base transceiver stations are located at the cell site. The base transceiver stations receive radio signals from respective mobile stations. A first one of the base transceiver stations provides a first backhaul signal, and a second one of the base transceiver stations provides a second backhaul signal. The cell site multiplexes these backhaul signals together onto an Ethernet passive optical network. In one embodiment, these signals are provided on different pseudowire connections within a single wavelength lambda on the passive optical network. In another embodiment, the signals are provided on different lambdas of the network.

Disclosed are a wireless communication system and method and an expansion unit of a flat network architecture. The wireless communication system comprises at least one baseband signal source, an expansion unit (EU) and at least one remote radio unit (RU) connected to the EU. By overlapping the baseband signals output by each baseband signal source, remote transmission and wireless coverage of multimode digital signals are achieved, thereby solving the problem of system performance degradation caused by the interaction of radio-frequency analog signal transmission and optical transmission in the prior art.

An optoelectronic module management system includes a network connection communicatively coupled to an optoelectronic module, a memory, and a processing device operatively coupled to the memory. The processing device is configured to perform or control performance of operations that include identify the optoelectronic module via a management network. The optoelectronic module includes a management communication element that is communicatively coupled to the management network and an optical communication element that is communicatively coupled to a fiber optic cable. The operations further include add the optoelectronic module to a list of monitored devices, monitor the optoelectronic module, provide a service to the optoelectronic module in response to the monitoring, and generate a report of the service provided to the optoelectronic module.

A satellite system uses cloud computing virtualized gateways, radio transport protocol and on-ground beamforming to improve wireless communication. A digitized ground based subsystem for use with the satellite system can be employed in transmitting an optical feeder uplink beam to a communications platform that includes a multiple element antenna array. The ground based subsystem is configured to receive the optical feeder uplink beam and, in dependence thereon, use the multiple element antenna feed array to produce and transmit a plurality of RF service downlink beams to a single or plurality of service terminals.

Cyclic prefix (CP) detection and removal in a wireless communications system (WCS) is disclosed. More specifically, embodiments disclosed herein relate to removing a CP(s) from a random-access symbol(s) in an open radio access network (O-RAN) communications system in the WCS. The random-access symbol(s) includes the CP followed by a random-access sequence. As such, the CP must be removed before the random-access sequence can be detected and processed. In this regard, in embodiments disclosed herein, the O-RAN communications system is configured to determine a group delay associated with the random-access symbol(s) to thereby accurately determine a start of the CP in the random-access symbol(s). Accordingly, the O-RAN communications system can detect and remove the CP from the random-access symbol(s) based on the determined start of the CP. As a result, it is possible to preserve integrity of the random-access symbol(s) to thereby reduce random-access latency in the WCS.

A system for providing a reduced common public radio interface (CPRI) framelet link includes one or more cellular towers, each cellular tower including one or more cellular antennas and coupled to a first short CPRI fiber link. An access subsystem is coupled to a baseband pool. The access subsystem is coupled to the first short CPRI fiber link via a first framelet block, and the first framelet block facilitates interfacing the first short CPRI fiber link to the access subsystem.

Embodiments disclosed in the detailed description include analog distributed antenna system (DAS) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (RF) communications signals. Analog RF communications signals received from analog RF signal sources are distributed in the analog DAS without being digitized. The analog DAS is also configured to interface with digital signal sources and compatibly distribute digital communications signals. Hence, a digital signal interface in head-end equipment (HEE) is configured to convert downlink digital communications signals to downlink analog RF communications signals for distribution to a plurality of remote units. The digital signal interface is also configured to convert uplink analog RF communications signals to uplink digital communications signals for distribution to the digital signal source(s). By providing the digital signal interface in the HEE, the analog DAS can be configured to distribute digital communications signals to analog DAS components.

A remote device of an optical relay system includes first and second remote driving units each extracting transmission signals of different frequency bands from downlink Radio Frequency (RF) signals provided from an optical conversion unit and outputting the transmission signals; and a downlink path control unit receiving the downlink RF signals from the optical conversion unit and transmitting the downlink RF signals to the second remote driving unit through the first remote driving unit, or transmitting the downlink RF signals to the second remote driving unit by bypassing the first remote driving unit.

An optical transmitter includes a DMT modulating unit that allocates information signals to SCs and that generates a DMT signal by performing multi-level modulation on each of the information signals allocated to each of the SCs. The optical transmitter includes a mixer that shifts, on the basis of the probe result of the DMT signal and frequency information on a wireless signal that is input, the carrier frequency of the wireless signal so as not to overlap the SC to which the information signal in the DMT signal is allocated. Furthermore, the optical transmitter includes a multiplexing unit that multiplexes the DMT signal received from the DMT modulating unit and the wireless signal in which the carrier frequency has been shifted and outputs the multiplexed signal.

A system and method for channelization of a wideband radio frequency signal into multiple narrowband channels includes obtaining, a dual-banded optical signal, where the dual-banded signal is a translated wideband radio frequency signal, and where the dual-banded signal includes a signal and an idler. The method also includes modifying, by the spectral phase mask, the spectral phases of at least one of the signal or the idler, where the modifying produces a spectral phase modulated output comprising at least one of a spectrally-modulated signal or a spectrally modulated idler. The method includes outputting, by the spectral phase mask, the spectral phase modulated output to an optical phase sensitive amplifier. The method includes receiving, by the optical phase sensitive amplifier, the spectral phase modulated output, and either amplifying or de-amplifying, by the optical phase sensitive amplifier, each component of the spectrally modulated output.